fix build errors

Mobile Buy SDK/Mobile Buy SDK Tests/BUYClientTest_Storefront.m

@@ -181,7 +181,7 @@
 		
 		XCTAssertNotNil([collections.firstObject title]);
 		XCTAssertNotNil([collections.firstObject handle]);
-		XCTAssertNotNil([collections.firstObject collectionId]);
+		XCTAssertNotNil([collections.firstObject identifier]);
 
 		self.collection = collections.firstObject;
 		[expectation fulfill];
@@ -205,7 +205,7 @@
 		
 		XCTAssertNotNil([collections.firstObject title]);
 		XCTAssertNotNil([collections.firstObject handle]);
-		XCTAssertNotNil([collections.firstObject collectionId]);
+		XCTAssertNotNil([collections.firstObject identifier]);
 
 		[expectation fulfill];
 	}];
@@ -246,7 +246,7 @@
 	
 	XCTestExpectation *expectation = [self expectationWithDescription:NSStringFromSelector(_cmd)];
 
-	[self.client getProductsPage:1 inCollection:self.collection.collectionId completion:^(NSArray *products, NSUInteger page, BOOL reachedEnd, NSError *error) {
+	[self.client getProductsPage:1 inCollection:self.collection.identifier completion:^(NSArray *products, NSUInteger page, BOOL reachedEnd, NSError *error) {
 	
 		XCTAssertNil(error);
 		XCTAssertNotNil(products);

Mobile Buy SDK/Mobile Buy SDK Tests/BUYLineItemTest.m

@@ -43,7 +43,7 @@
 
 	_modelManager = [BUYModelManager modelManager];
 	_variant = [[BUYProductVariant alloc] initWithModelManager:_modelManager JSONDictionary:@{ @"id" : @1, @"requires_shipping" : @YES }];
-	_lineItem = [[BUYLineItem alloc] initWithVariant:_variant];
+	_lineItem = [_modelManager lineItemWithVariant:_variant];
 }
 
 - (void)tearDown
@@ -79,7 +79,7 @@
 - (void)testJsonDictionaryShouldShowAllProperties
 {
 	BUYProductVariant *variant = [[BUYProductVariant alloc] initWithModelManager:_modelManager JSONDictionary:@{ @"id" : @5 }];
-	_lineItem = [[BUYLineItem alloc] initWithVariant:variant];
+	_lineItem = [_modelManager lineItemWithVariant:variant];
 	_lineItem.quantity = [NSDecimalNumber decimalNumberWithString:@"3"];
 	_lineItem.price = [NSDecimalNumber decimalNumberWithString:@"5.55"];
 	_lineItem.title = @"banana";